A centrifugal model study of slope instability in Ottawa area Champlain Sea clay

1985 ◽  
Vol 22 (1) ◽  
pp. 102-109 ◽  
Author(s):  
D. J. Goodings ◽  
A. N. Schofield
Keyword(s):  
Simulation Models ◽  
Horizontal Stress ◽  
Slope Instability ◽  
Eastern Canada ◽  
Geotechnical Centrifuge ◽  
Model Study ◽  
Scale Models ◽  
Scale Modelling ◽  
Centrifugal Model ◽  
Reduced Scale

Problems of serious slope instability in quick Champlain Sea clay, also known as Leda clay, found in eastern Canada, have been the subject of debate regarding mechanisms of failure and relevant strength characteristics. Eight intact samples of Ottawa area Champlain Sea clay were retrieved, formed into 19 different slope configurations, and tested as reduced-scale models on the Cambridge University 4.25 m diameter 150 g geotechnical centrifuge. Of these, 14 showed some manner of slope instability, ranging from deep intact slope movement, to slope degradation, to flowsliding. Speculation is made on the importance of time-dependent horizontal stress release, on the possibility that prototype failure is not circular and rotational, and that uplift may affect subsequent retrogressions in prototypical landslides but not initial failure. Inconsistencies in the behaviours of models were attributed in part to certain possible limitations on reduced-scale modelling; these included the effects of the unscaled network of fissures and the loss of strength as a function of displacement rather than of strain. Key words: centrifuge, clays, failures, simulation models, slope stability.

Shaking Table Test Analysis of Bottom-Business Multi-Story Masonry Structure in Small and Middle Towns in the Southward

2014 ◽  
Vol 580-583 ◽  
pp. 1463-1466
Author(s):  
Yong Duo Liang ◽  
Xun Guo ◽  
Hua Wei Yi ◽  
Yong Zhen Li ◽  
Jin Zheng Jiang
Keyword(s):  
Shaking Table Test ◽  
Masonry Structure ◽  
Shaking Table ◽  
Earthquake Simulation ◽  
Seismic Capacity ◽  
Test Analysis ◽  
Earthquake Resistant ◽  
Scale Models ◽  
Longitudinal Wall ◽  
Reduced Scale

Bottom-business multi-story masonry structure is widely used in small and middle towns in the southward in China. In the downtown of Beichuan county which affected by Wenchuan earthquake, more than 80% of this kind of building collapsed. But the Apartment of Beichuan Telecommunication Bureau behaved well earthquake resistant capacity with a moderate damage in the earthquake. The obvious difference between this building and others is the setting of winged columns in the front longitudinal wall of the first floor. For proving the influence of these members in the structure seismic capacity, the earthquake simulation shaking table test of 2 1/5 reduced scale models were designed and carried out. The models dynamic response, acceleration, displacement and strain were measured and collected, that model with winged columns behave well was testified. And the reinforcement method of balancing stiffness and increasing ductility is put forward. The results provide a foundation for the retrofitting design of the existing houses.

Reduced-scale model study on cable heat dissipation and airflow distribution of power cabins

2019 ◽  
Vol 160 ◽  
pp. 114068 ◽  
Author(s):  
Jiaxu Wang ◽  
Xuefeng Liu ◽  
Siwei Chen ◽  
Hanghang Jiang ◽  
Guanyu Fang ◽  
...  
Keyword(s):  
Heat Dissipation ◽  
Scale Model ◽  
Model Study ◽  
Airflow Distribution ◽  
Distribution Of Power ◽  
Reduced Scale

Investigation of the Mechanical Behavior of 3D Printed Polyamide-12 Joints for Reduced Scale Models of Rock Mass

2020 ◽  
Vol 53 (6) ◽  
pp. 2687-2705
Author(s):  
Jana Jaber ◽  
Marianne Conin ◽  
Olivier Deck ◽  
Mohamed Moumni ◽  
Olivier Godard ◽  
...  
Keyword(s):  
Rock Mass ◽  
Mechanical Behavior ◽  
Polyamide 12 ◽  
Scale Models ◽  
3D Printed ◽  
Reduced Scale

scholarly journals A hybrid approach to multi-scale modelling of cancer

2010 ◽  
Vol 368 (1930) ◽  
pp. 5013-5028 ◽  
Author(s):  
J. M. Osborne ◽  
A. Walter ◽  
S. K. Kershaw ◽  
G. R. Mirams ◽  
A. G. Fletcher ◽  
...  
Keyword(s):  
Continuum Model ◽  
Hybrid Approach ◽  
Multi Scale ◽  
Scale Models ◽  
Scale Modelling ◽  
A Cell ◽  
Solid Tumour Growth ◽  
Basic Features ◽  
Cancerous Cells ◽  
Mutant Cells

In this paper, we review multi-scale models of solid tumour growth and discuss a middle-out framework that tracks individual cells. By focusing on the cellular dynamics of a healthy colorectal crypt and its invasion by mutant, cancerous cells, we compare a cell-centre, a cell-vertex and a continuum model of cell proliferation and movement. All models reproduce the basic features of a healthy crypt: cells proliferate near the crypt base, they migrate upwards and are sloughed off near the top. The models are used to establish conditions under which mutant cells are able to colonize the crypt either by top-down or by bottom-up invasion. While the continuum model is quicker and easier to implement, it can be difficult to relate system parameters to measurable biophysical quantities. Conversely, the greater detail inherent in the multi-scale models means that experimentally derived parameters can be incorporated and, therefore, these models offer greater scope for understanding normal and diseased crypts, for testing and identifying new therapeutic targets and for predicting their impacts.

A Study of Direct Solar Radiation Transmission in Asymmetrical Multi-span Greenhouses using Scale Models and Simulation Models

2004 ◽  
Vol 88 (2) ◽  
pp. 243-253 ◽  
Author(s):  
T. Soriano ◽  
J.I. Montero ◽  
M.C. Sánchez-Guerrero ◽  
E. Medrano ◽  
A. Antón ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Simulation Models ◽  
Direct Solar Radiation ◽  
Scale Models ◽  
Radiation Transmission

Particle Based Numerical Analysis of Green Water on FPSO Deck

2013 ◽  
Author(s):  
Cezar Augusto Bellezi ◽  
Liang-Yee Cheng ◽  
Kazuo Nishimoto
Keyword(s):  
Experimental Data ◽  
Numerical Analysis ◽  
Sea Water ◽  
Three Dimensional ◽  
High Amplitude ◽  
Green Water ◽  
Scale Models ◽  
Three Dimensional Models ◽  
Reduced Scale ◽  
Good Agreement

The green water phenomenon is boarding of sea water onto the deck due to high amplitude waves, which can cause several damages to the equipment on deck. In the present paper the green water phenomenon on three-dimensional models is analyzed using the Moving Particles Semi-Implicit Method (MPS), a fully lagrangian method for incompressible flow. This work is focused on the validation of the method comparing the numerical results with experimental results for green water on reduced scale models. The pressure on sensors over the deck of the models shows good agreement with experimental data.

Late Minoan III and Early Iron Age Cretan Cylindrical Terracotta Models: A Reconsideration

2006 ◽  
Vol 101 ◽  
pp. 183-216 ◽  
Author(s):  
Vassilis P. Petrakis
Keyword(s):  
Iron Age ◽  
Early Iron Age ◽  
Ancestor Worship ◽  
Archaeological Data ◽  
Scale Models ◽  
Terracotta Figurines ◽  
Relationship Of ◽  
The Relationship ◽  
Theoretical Issues ◽  
Reduced Scale

The present study explores the possible interpretation of the terracotta cylindrical models found in Late Minoan to Early Iron Age contexts (generally known as “(circular) hut models”) as reduced-scale models of tholos tombs. Theoretical issues concerning the relationship of an ‘architectural model’ with the archaeological context in which it is found are examined in order to support the above-mentioned suggestion. Archaeological data concerning the morphology, chronology, distribution, use and significance of the Late Minoan and Early Iron Age tholos tombs are explored in order to contribute to the discussion. The possible connection between the presence of the LM III tomb models in domestic contexts and the absence of contemporary intramural burials allows us to expand on the possible significance of these artefacts for our knowledge of LM mortuary practices and beliefs, especially those concerning the possible practice of ‘ancestor worship’. The presence of terracotta figurines of the ‘Minoan Goddess with Upraised Arms’ type attached in the interior of two examples (from SM Knossos and PG B Archanes) is considered as a late development within the tradition of these models and linked with the practice of placing MGUA figures in Early Iron Age tholos tombs (Rhotasi, Kourtes).

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